public static void luaK_prefix(FuncState fs, UnOpr op, expdesc e)
{
expdesc e2 = new expdesc();
e2.t = e2.f = NO_JUMP; e2.k = expkind.VKNUM; e2.u.nval = 0;
switch (op)
{
case UnOpr.OPR_MINUS: {
if (isnumeral(e) != 0 && e.u.nval != 0) /* minus non-zero constant? */
{
e.u.nval = luai_numunm(null, e.u.nval); /* fold it */
}
else
{
luaK_exp2anyreg(fs, e);
codearith(fs, OpCode.OP_UNM, e, e2);
}
break;
}
case UnOpr.OPR_NOT: codenot(fs, e); break;
case UnOpr.OPR_LEN: {
luaK_exp2anyreg(fs, e); /* cannot operate on constants */
codearith(fs, OpCode.OP_LEN, e, e2);
break;
}
default: lua_assert(0); break;
}
}
public static void luaK_prefix(FuncState fs, UnOpr op, expdesc e, int line)
{
expdesc e2 = new expdesc();
e2.t = e2.f = NO_JUMP; e2.k = expkind.VKFLT; e2.u.nval = 0;
switch (op)
{
case UnOpr.OPR_MINUS: {
if (0 == constfolding(OpCode.OP_UNM, e, e)) /* cannot fold it? */
{
luaK_exp2anyreg(fs, e);
codearith(fs, OpCode.OP_UNM, e, e2, line);
}
break;
}
case UnOpr.OPR_NOT: codenot(fs, e); break;
case UnOpr.OPR_LEN: {
luaK_exp2anyreg(fs, e); /* cannot operate on constants */
codearith(fs, OpCode.OP_LEN, e, e2, line);
break;
}
default: lua_assert(0); break;
}
}
public static void luaK_prefix(FuncState fs, UnOpr op, expdesc e)
{
expdesc e2 = new expdesc();
e2.t = e2.f = NO_JUMP; e2.k = expkind.VKNUM; e2.u.nval = 0;
switch (op)
{
case UnOpr.OPR_MINUS: {
if (isnumeral(e) == 0)
{
luaK_exp2anyreg(fs, e); /* cannot operate on non-numeric constants */
}
codearith(fs, OpCode.OP_UNM, e, e2);
break;
}
case UnOpr.OPR_NOT: codenot(fs, e); break;
case UnOpr.OPR_LEN: {
luaK_exp2anyreg(fs, e); /* cannot operate on constants */
codearith(fs, OpCode.OP_LEN, e, e2);
break;
}
default: lua_assert(0); break;
}
}
public static void LuaKPrefix(FuncState fs, UnOpr op, expdesc e)
{
expdesc e2 = new expdesc();
e2.t = e2.f = NO_JUMP; e2.k = expkind.VKNUM; e2.u.nval = 0;
switch (op)
{
case UnOpr.OPR_MINUS: {
if (IsNumeral(e) == 0)
{
LuaKExp2AnyReg(fs, e); /* cannot operate on non-numeric constants */
}
CodeArith(fs, OpCode.OP_UNM, e, e2);
break;
}
case UnOpr.OPR_NOT: CodeNot(fs, e); break;
case UnOpr.OPR_LEN: {
LuaKExp2AnyReg(fs, e); /* cannot operate on constants */
CodeArith(fs, OpCode.OP_LEN, e, e2);
break;
}
default: LuaAssert(0); break;
}
}
public static void luaK_prefix(FuncState fs, UnOpr op, expdesc e, int line)
{
expdesc e2 = new expdesc();
e2.t = NO_JUMP;
e2.f = NO_JUMP;
e2.k = expkind.VKINT;
e2.u.ival = 0;
switch (op)
{
case UnOpr.OPR_MINUS: goto case UnOpr.OPR_LEN;
case UnOpr.OPR_BNOT: goto case UnOpr.OPR_LEN;
case UnOpr.OPR_LEN: {
lcode.codeexpval(fs, OpCode.OP_UNM + (int)(op - UnOpr.OPR_MINUS), e, e2, line);
break;
}
case UnOpr.OPR_NOT: {
lcode.codenot(fs, e);
break;
}
default: {
lua_assert(false);
break;
}
}
}
public static void luaK_prefix(FuncState fs, UnOpr op, expdesc e, int line)
{
expdesc e2 = new expdesc();
e2.t = e2.f = NO_JUMP; e2.k = expkind.VKINT; e2.u.ival = 0;
switch (op)
{
case UnOpr.OPR_MINUS:
case UnOpr.OPR_BNOT:
case UnOpr.OPR_LEN: {
codeexpval(fs, (OpCode)((op - UnOpr.OPR_MINUS) + OpCode.OP_UNM), e, e2, line);
break;
}
case UnOpr.OPR_NOT: codenot(fs, e); break;
default: lua_assert(0); break;
}
}
public static void Prefix(FuncState fs, UnOpr op, ExpDesc e, int line)
{
ExpDesc e2 = new ExpDesc();
e2.ExitTrue = NO_JUMP;
e2.ExitFalse = NO_JUMP;
e2.Kind = ExpKind.VKNUM;
e2.NumberValue = 0.0;
switch (op)
{
case UnOpr.MINUS:
{
if (IsNumeral(e)) // minus constant?
{
e.NumberValue = -e.NumberValue;
}
else
{
Exp2AnyReg(fs, e);
CodeArith(fs, OpCode.OP_UNM, e, e2, line);
}
}
break;
case UnOpr.NOT:
{
CodeNot(fs, e);
}
break;
case UnOpr.LEN:
{
Exp2AnyReg(fs, e); // cannot operate on constants
CodeArith(fs, OpCode.OP_LEN, e, e2, line);
}
break;
default:
throw new Exception("[Coder]Prefix Unknown UnOpr:" + op);
}
}
/*
** Aplly prefix operation 'op' to expression 'e'.
*/
public static void luaK_prefix(FuncState fs, UnOpr op, expdesc e, int line)
{
//static const expdesc ef = {VKINT, {0}, NO_JUMP, NO_JUMP};
switch (op)
{
case UnOpr.OPR_MINUS:
case UnOpr.OPR_BNOT: /* use 'ef' as fake 2nd operand */
if (0 != constfolding(fs, (int)op + LUA_OPUNM, e, luaK_prefix_ef))
{
break;
}
/* FALLTHROUGH */
goto case UnOpr.OPR_LEN;
case UnOpr.OPR_LEN:
codeunexpval(fs, (OpCode)((int)op + OpCode.OP_UNM), e, line);
break;
case UnOpr.OPR_NOT: codenot(fs, e); break;
default: lua_assert(0);
break;
}
}
public static void LuaKPrefix (FuncState fs, UnOpr op, expdesc e) {
expdesc e2 = new expdesc();
e2.t = e2.f = NO_JUMP; e2.k = expkind.VKNUM; e2.u.nval = 0;
switch (op) {
case UnOpr.OPR_MINUS: {
if (IsNumeral(e)==0)
LuaKExp2AnyReg(fs, e); /* cannot operate on non-numeric constants */
CodeArith(fs, OpCode.OP_UNM, e, e2);
break;
}
case UnOpr.OPR_NOT: CodeNot(fs, e); break;
case UnOpr.OPR_LEN: {
LuaKExp2AnyReg(fs, e); /* cannot operate on constants */
CodeArith(fs, OpCode.OP_LEN, e, e2);
break;
}
default: LuaAssert(0); break;
}
}
public static void Prefix( FuncState fs, UnOpr op, ExpDesc e, int line )
{
ExpDesc e2 = new ExpDesc();
e2.ExitTrue = NO_JUMP;
e2.ExitFalse = NO_JUMP;
e2.Kind = ExpKind.VKNUM;
e2.NumberValue = 0.0;
switch( op )
{
case UnOpr.MINUS: {
if( IsNumeral( e ) ) // minus constant?
{
e.NumberValue = -e.NumberValue;
}
else
{
Exp2AnyReg( fs, e );
CodeArith( fs, OpCode.OP_UNM, e, e2, line );
}
} break;
case UnOpr.NOT: {
CodeNot( fs, e );
} break;
case UnOpr.LEN: {
Exp2AnyReg( fs, e ); // cannot operate on constants
CodeArith( fs, OpCode.OP_LEN, e, e2, line );
} break;
default:
throw new Exception("[Coder]Prefix Unknown UnOpr:" + op);
}
}
/*
** subexpr . (simpleexp | unop subexpr) { binop subexpr }
** where `binop' is any binary operator with a priority higher than `limit'
*/
private static BinOpr subexpr(LexState ls, expdesc v, uint limit)
{
BinOpr op = new BinOpr();
UnOpr uop = new UnOpr();
enterlevel(ls);
uop = getunopr(ls.t.token);
if (uop != UnOpr.OPR_NOUNOPR) {
LuaXNext(ls);
subexpr(ls, v, UNARY_PRIORITY);
LuaKPrefix(ls.fs, uop, v);
}
else simpleexp(ls, v);
/* expand while operators have priorities higher than `limit' */
op = getbinopr(ls.t.token);
while (op != BinOpr.OPR_NOBINOPR && priority[(int)op].left > limit)
{
expdesc v2 = new expdesc();
BinOpr nextop;
LuaXNext(ls);
LuaKInfix(ls.fs, op, v);
/* read sub-expression with higher priority */
nextop = subexpr(ls, v2, priority[(int)op].right);
LuaKPosFix(ls.fs, op, v, v2);
op = nextop;
}
leavelevel(ls);
return op; /* return first untreated operator */
}
public static void luaK_prefix (FuncState fs, UnOpr op, expdesc e) {
expdesc e2 = new expdesc();
e2.t = e2.f = NO_JUMP; e2.k = expkind.VKNUM; e2.u.nval = 0;
switch (op) {
case UnOpr.OPR_MINUS: {
if (isnumeral(e)==0)
luaK_exp2anyreg(fs, e); /* cannot operate on non-numeric constants */
codearith(fs, OpCode.OP_UNM, e, e2);
break;
}
case UnOpr.OPR_NOT: codenot(fs, e); break;
case UnOpr.OPR_LEN: {
luaK_exp2anyreg(fs, e); /* cannot operate on constants */
codearith(fs, OpCode.OP_LEN, e, e2);
break;
}
default: lua_assert(0); break;
}
}
